I am a Bimmer. I don’t admire foreign things, but I do like German industry. I like precision instruments, industrial ceiling products, etc. Based on today’s gearbox ceiling (ZF)? BMW’s six-cylinder engine has incorporated the 540i. I didn’t buy an M5 because I was considering taking care of my family (well… okay, I was poor). First of all, I have to admit that the 540i is indeed a very easy car to drive, but it’s not a lot of exercise. But after a year, I discovered a very fatal problem and shared it with my friends who will become 540 car owners in the future for rational thinking. During a year of buying the car, I replaced three tires and one wheel hub with me. The reason is all kinds of puncture tires. Take Shanghai where I live as an example. In many sections of road, as long as there are potholes on the road, you will either die or be injured after 60 yards. Some people will say that the driving skills are not good, well, if you are really a driver, you will understand that this is really difficult to avoid. The puncture prevention with low tire flat ratio is not suitable for Chinese roads. The original factory I equipped is Bridgestone, and the cost of replacing the tire hub has already caught up with a year’s fuel cost. This is really depressing. Now when I go to build roads and pass on unfamiliar roads, I basically maintain it at 30 yards. I am careful and afraid. The actual home experience is greatly reduced. I have not yet driven my Passat at home for something. I am so calm and relieved that I am too cute to hurt. Of course, in paying tribute to the classics, I will pass on my 540 until I know that he can’t run, otherwise my parking space will always have a place for it. I write these things with emotion this time because I want other enthusiasts to understand the 540 issue from a more perspective. Don’t argue with me to change ordinary tires. What do you feel about changing them? Of course, this is mainly a problem of preventing side puncture due to low flat ratio, so please be careful.